CA1158805A - Pile-knit panel diaper - Google Patents

Pile-knit panel diaper

Info

Publication number
CA1158805A
CA1158805A CA000382532A CA382532A CA1158805A CA 1158805 A CA1158805 A CA 1158805A CA 000382532 A CA000382532 A CA 000382532A CA 382532 A CA382532 A CA 382532A CA 1158805 A CA1158805 A CA 1158805A
Authority
CA
Canada
Prior art keywords
diaper
pile
knit
panel
panel portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000382532A
Other languages
French (fr)
Inventor
Wing Y. T. Lau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kendall Co
Original Assignee
Kendall Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kendall Co filed Critical Kendall Co
Application granted granted Critical
Publication of CA1158805A publication Critical patent/CA1158805A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B1/00Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/22Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
    • D04B1/24Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

ABSTRACT OF THE INVENTION

A rectangular tubular-knitted diaper is produced on a circular knitting machine. The diaper has at least one hydrophilic terry-knit panel in its central portion, bounded on both sides by non-terry-knit panels, such as a jersey stitch.

Description

This invention relates to a tubular knitted diaper in which the central portion of the diaper comprises on at least one of its surfaces a pile-looped or terry cloth structure of highly absor-bent nature, the side portions of the diaper being knitted integrally with the center portions but in a non-pile type of stitch.

BACK¢ROUND OF THE INVENTION

In the development of the desirable qualities of absorbency, softness, and more especially, convenience in use, it has been common practice to fold woven or knitted diaper fabrics into a generally rectangular configuration, securing the folded layers into permanent position by stitching or similar means. Such diapers ready for application, are commonly called "prefolds", no matter which particular type of fabric construction they are composed of.

In the knitted diaper art, it is also known to provide such diapers with a pile surface, or terry knit, as in U. S. Patent 3955575, to Okuda. Such structures, however, have a pile of terry knit construction throughout the entire outer surface of the diaper; further, due to the upper portion of the diaper being wider than the lower portion, such diapers are not amenable to rapid, straight-line construction procedures, and are expensive to produce.

Another type of pile-surfaced diaper is disclosed in U. S. Patent 3367333, to Scheier, introducing the concept of confining the terry knit yarns to the central portion of the diaper. Such
-2- -~ ;

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1 1588~5 diapers, however, are produced by a multi-stage series of operations involving the formation of a base fabricl the super-imposition thereon of a set of pile-loop yarns, and a series of folding and sewing operations to form the fabric into a prefold diaper.

SUMMARY OF THE INVENTIQN

The present invention relates to a ready-to-use, tubular knit diaper with at least one central panel of pile or terry knit con-struction on a least one surface thereof.

The diapers of this invention can be produced more simply, rapidly, and economically than prior art knitted panel diapers.

The invention will be better understood with reference to the ~:~
following description and drawings, in which:

FIGURE 1 is an isometric view of a preferred embodiment of this invention in which the pile-knit panel extends lengthwise of the diaper.

FIGURE 2 is an isometric view of another embodiment of the ~:
invention in which the pile-knit panel extends crosswise of the shorter dimension of the diaper.
. ~
FIGURES 3, 4, 5, 6, and 7 are representations of cross-sectional views of five different em~odiments of this invention, as taken along the line A-A of FIGURE 1 or line B-B of FIGURE 2.

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l 1588~5 FIGURE 8 is a magnified representation of a segment of a surface of a diaper of this invention, showing the pile-knit and non-pile-knit portions.

Referring now to FIGURE l, the diapers of this invention are of generally rectangular shape, preferably greater in length than in width, as indicated at 30. At least one rectangular panel, 25, of pile-knit construction, comprising hydrophilic yarns, is located substantially centrally of the diaper, and is bounded along two of its opposing side dimensions by a pair of non-pile-knit panels 20, 20, which may be of jersey knit or similar stitch. The ground yarn which forms the jersey stitch may be hydrophilic like the pile yarn, or may be a hydrophobic yarn such as polyester, thus adding an element of non-absorbency or dryness to those portions of the diaper.

All of the diapers of this invention are of tubular knit, which provides a pair of knitted outside edges, 32, 32, in FIGURE l, which are soft and conformable, requiring no sewing operations which are essential for diapers made by folding sheet material.
If desired, the side portions of the pile-knit panel may be stitched by sewing through both layers of the diaper as at 35, 35 in FIGURE l, or as shown more clearly at 22, 22 in FIGURES 3 through 7. Such sewing serves to anchor the pile-knit panel in a central portion of the diaper.

The diapers, formed on a circular knitting machine as described more fully below, are cut to suitable length, the cut edges being secured as by ~veredge stitching as at 34, 34 in FIGURE l.

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FIGURE 2 is a diaper similar to EIGURE 1 except that the pile-knit panel runs across the width of the diaper, instead of along its length. In FIGURE 2, the knitted pile panel 42 is bounded along its longer dimensions by a pair of non-pile-knit panels 44, 44, and the knitted edges 46,46 are at the top and bottom edges of the diaper. The optional sewings 45, 45 along the sides of the pile panel correspond to the sewings 35,35 of FIGURE 1, and the overedge stitchings 48, 48 correspond to 34, 34 of FIGURE 1.

As explained more fully below, the diaper of FIGURE 2 is formed on a circular knitting machine of larger diameter than is employed for the diaper of FIGURE 1, so that in both cases the pile-knit panel is created in a continuous and uninterrupted process.

FIGURES 3 through 7 are similar cross-sectional representations showing five variations of the diapers of this invention. The diapers, 10, 12, 14, 16, and 18, have in common a tubular knit construction with a pair of non-pile-knit side panels, 20, 20, and the optional stitching 22, 22, sewing to stabilize the pile-knit panel substantially centrally of the diaper.

In FIGURE 3, the pile panel portion 24 is a single panel located on the interior of one face of the diaper. In FIGURE 4, the pile panel portion 26 is located on the exterior of one face of the diaper, which may be accomplished by turning the diaper of FIGURE 3 inside out before inserting the stitching 22, 22, or, alternatively, by modifying the circular knitting machine to form the loops of pile yarn on the outside face of the diaper.

FIGURE 5 is a cross-section of a diaper wherein two pile-knit 11588~

panels, 24, 24, have been formed on both of the inside faces of the two diaper surfaces as by arranging two sets of terry sinkers on opposing sides of the circular knitting machine, as will be readily understood by those skilled in the knitting art.

In FIGURE 6, a pair of pile-knit panel portions have been formed on both of the exterior faces of the two diaper surfaces, whereas in FIGURE 7 the two pile-knit panel portions are situated one, 24, on an interior surface of the diaper and another, 26, on the exterior of the opposite surface.

In FIGURE 7, two pile-knit panel portions have been formed by known modification of a circular knitting machine, so that one portion 26 is formed on the exterior suface of one layer of the diaper, and a second portion 24 is formed on the interior surface of the other layer of the diaper.
.:
FIGURE 8 represents, in magnified form, the transition from a pile-knît panel area C to a non-pile knit panel area D. A
hydrophilic yarn 54 is interknit with a ground yarn 50, which may be hydrophilic or hydrophobic. The knitting pattern, governed by the placement of the sinkers in the circular knitter, is such that the hydrophilic yarn 54 is formed into pile loops 52 in the pile-knit panel area, but is knit into a jersey stitch 56, together with the ground yarn, in the non-pile-knit panel portion.

Using a body-size terry-knit machine, such as the Albi Single-plush Circular Knitting Machine, 12 inch diameter, 18-cut with , l lS88~S
672 needles, the diaper of FIGURE 1, shown in cross-section in FIGURE 5, was constructed using a ground yarn of 70 denier 34 filament textured polyester (50 ln FIGURE 8) and a loop yarn of 26/1 cotton (54 in FI~GURE 8). Two sections of terry sinkers, 140 in each section, were arranged on opposite sides of the knitting machine.

The diaper thus produced, with a hydrophilic pile-loop panel on each of the opposing lnterior faces of the tubular diaper, was cut into 20 inch lengths and supplied with overedge stitching on the cut edges. Such diapers, weighing about 50 grams each, absorbed more than five times their own weight in water when wet out and subsequently drained for one minute.

The diaper of FIGURE 2 is constructed in similar fashlon except that the width of the diaper as it comes from the knitting machine becomes the length of the finished diaper. Therefore a larger diameter circular knitting machine is used, such as an Albi of 17 inch diameter, 18 cut, with 960 needles. The opposing sets of terry sinkers, one on each side of the machine, had 180 sinkers in each section, to provide an eight-lnch terry panel on each of the opposing interior fa¢es of the diaper. The yarns employed were the same as in the previous example.

The diaper thus produced comes from the machine in a l9-inch width, and is cut into 15 inch sections. Overedge stitching is supplied to the 19 inch edges to provide a finished diaper 19 inches long by 15 inches wide, with the pile panels running across the width of the diaper.

~ 158~$

OTHER EMBOD~MENTS OF THE I`NVENTION.

Although cotton yarn was specified as the hydrophilic yarn in the above examples, it is obvious that other hydrophilic yarns may be employed, such as rayon or hydrophilic synthetic yarns.

It will also be apparent to those skilled in the art that by adjustment of the sinkers in the circular knitting machine, the number and placement of the terry panels may be varied from one to two and may be on the inner or outer surface of the diaper, as shown schematically in FIGURES 3 through 7. It is similarly apparent that by the use of a so-called "stripper attachment", as is used in sock machines, a terry or loop panel can be inserted at any desired point on the circumference of the knitted article.

Thus, although both a ground yarn and a loop yarn were interknit throughout the whole circumference of the diapers of the specific embodiments, above, it is possible to produce the diapers of this invention by using a single ground yarn and a hydrophilic loop yarn which is confined to the terry panel or panels.
~,~

.. . .

Claims (10)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In diapers comprising pile-knit and non-pile-knit portions, the improvement which comprises a tubular knit diaper of rectangular shape having a pair of opposing side edges of continuous knit construction, said diaper having at least one centrally-disposed rectangular panel portion of hydrophilic yarns knit in pile-loop configuration, said centrally-disposed panel portion being bounded along an opposing pair of its side dimensions by a pair of non-pile-knit rectangular panels.
2. The diaper according to claim 1 in which the pile-knit panel portion extends lengthwise of the diaper.
3. The diaper according to claim 1 in which the pile-knit panel portion extends laterally across the width of the diaper.
4. The diaper according to claim 1 in which both the pile-knit panel portion and the non-pile-knit panel portions comprise hydrophilic yarns.
5. The diaper according to claim 1 in which the non-pile-knit panel portions comprise hydrophobic yarns.
6. The diaper according to claim 5 in which the hydrophobic yarns are polyester.
7. The diaper according to claim 1 in which a pile-knit panel portion is disposed on the interior surface of one layer of said diaper.
8. The diaper according to claim 1 in which a pair of pile-knit panel portions is oppositely disposed on both interior surfaces of said diaper.
9. The diaper according to claim 1 in which a pile-knit panel portion is disposed on the exterior surface of one layer of said diaper.
10. The diaper according to claim 1 in which a pair of pile-knit panel portions is oppositely disposed on both exterior surfaces of said diaper.
CA000382532A 1980-12-18 1981-07-24 Pile-knit panel diaper Expired CA1158805A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21794180A 1980-12-18 1980-12-18
US217,941 1980-12-18

Publications (1)

Publication Number Publication Date
CA1158805A true CA1158805A (en) 1983-12-20

Family

ID=22813108

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000382532A Expired CA1158805A (en) 1980-12-18 1981-07-24 Pile-knit panel diaper

Country Status (9)

Country Link
JP (1) JPS57128203A (en)
AR (1) AR230557A1 (en)
AU (1) AU543609B2 (en)
BR (1) BR8108001A (en)
CA (1) CA1158805A (en)
DE (1) DE3148292A1 (en)
FR (1) FR2496417B1 (en)
GB (1) GB2089853B (en)
ZA (1) ZA818727B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020508U (en) * 1983-07-19 1985-02-13 株式会社 九州ニ−ド cloth diapers
CA2040602C (en) * 1990-04-24 2002-02-12 Takamitsu Igaue Disposable training pants
US20050095940A1 (en) * 2003-11-04 2005-05-05 Moshe Rock Composite fabric with engineered pattern
GB2435048B (en) * 2006-02-08 2011-01-26 Umbro Internat Ltd Fabric

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1189687A (en) * 1958-01-10 1959-10-06 Diaper
GB1088204A (en) * 1964-03-05 1967-10-25 Walter Neville Vickerstaff Rugs, mats or covers for floors, walls or articles of furniture
US3367333A (en) * 1965-07-12 1968-02-06 Kendall & Co Pile diaper
US3955575A (en) * 1974-12-13 1976-05-11 Yoshizo Okuda Diaper

Also Published As

Publication number Publication date
FR2496417B1 (en) 1986-10-17
GB2089853B (en) 1984-11-07
AU543609B2 (en) 1985-04-26
FR2496417A1 (en) 1982-06-25
AU7860381A (en) 1982-06-24
BR8108001A (en) 1982-09-21
ZA818727B (en) 1982-11-24
JPS57128203A (en) 1982-08-09
GB2089853A (en) 1982-06-30
AR230557A1 (en) 1984-05-31
DE3148292A1 (en) 1982-07-22

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